CVE-2026-24895
Description
FrankenPHP is a modern application server for PHP. Prior to 1.11.2, FrankenPHP’s CGI path splitting logic improperly handles Unicode characters during case conversion. The logic computes the split index (for finding .php) on a lowercased copy of the request path but applies that byte index to the original path. Because strings.ToLower() in Go can increase the byte length of certain UTF-8 characters (e.g., Ⱥ expands when lowercased), the computed index may not align with the correct position in the original string. This results in an incorrect SCRIPT_NAME and SCRIPT_FILENAME, potentially causing FrankenPHP to execute a file other than the one intended by the URI. This vulnerability is fixed in 1.11.2.
How to fix
- php frankenphp1.11.2 or later
- github.com/dunglas/frankenphp1.11.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| php frankenphp | v < 1.11.2 | 1.11.2 |
| github.com/dunglas/frankenphpGo | v < 1.11.2 | 1.11.2 |
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